Complexify aims to provide a good
measure of password complexity for websites to use both for giving hints to
users in the form of strength bars, and for casually enforcing a minimum
complexity for security reasons

There is no
submit button, just fill in a password to check it's strength. I removed the
submit button because of the accusation that I harvest
passwords and emails.
I wonder why should I do that ? for spam ? I think there are better ways to do
that, not by waisting time for writing an entire post on how to do a password
strength meter and waiting for some people to hit submit on the example page.

Password
Strength Checking with jQueryPassword
strength checking is an easy way to show the strength of user password on the
registration forms. It helps users to choose more secure password when filling
the forms.

In this
tutorial we will build a basic form field that provides live feedback to the
users about the password strength. The basic idea is to evaluate the password
string every time a user enters a character. We will check the password
strength using a few regular expressions with jQuery.